I find the charge of "conspiracy to commit aggravated trespass" close to thoughtcrime too. Just 20 years ago (under Thatcher!), "aggravated trespass" didn't even exist as an offence; and 'trespass' was just a civil offence, that only occurred when you refused to leave private property - it would have been impossible to have a 'conspiracy' to commit it in the future.
The BBC say all 114 have been released - on bail. So they may still get charged. I'd opt for a jury trial if I were them, if they are. The Kingsnorth protesters got off; and I think proving beyond reasonable doubt the 'aggravated' part of a charge when nothing as done could be difficult.